// 实现这个项目的构建任务
const { src, dest, parallel, series, watch } = require('gulp')

const del = require('del')
const browserSync = require('browser-sync')

const loadPlugins = require('gulp-load-plugins')
const plugins = loadPlugins()
const bs = browserSync.create()

const data = {
  menus: [
    {
      name: 'Home',
      icon: 'aperture',
      link: 'index.html',
    },
    {
      name: 'Features',
      link: 'features.html',
    },
    {
      name: 'About',
      link: 'about.html',
    },
    {
      name: 'Contact',
      link: '#',
      children: [
        {
          name: 'Twitter',
          link: 'https://twitter.com/w_zce',
        },
        {
          name: 'About',
          link: 'https://weibo.com/zceme',
        },
        {
          name: 'divider',
        },
        {
          name: 'About',
          link: 'https://github.com/zce',
        },
      ],
    },
  ],
  pkg: require('./package.json'),
  date: new Date(),
}

const clean = () => {
  return del(['dist', 'temp'])
}

const style = () => {
  return src('src/assets/styles/*.scss', { base: 'src' })
    .pipe(plugins.sass(require('node-sass'))({ outputStyle: 'expanded' }))
    .pipe(dest('temp'))
    .pipe(bs.reload({ stream: true }))
}

const script = () => {
  return src('src/assets/scripts/*.js', { base: 'src' })
    .pipe(plugins.babel({ presets: ['@babel/preset-env'] }))
    .pipe(dest('temp'))
    .pipe(bs.reload({ stream: true }))
}

const page = () => {
  return src('src/*.html', { base: 'src' })
    .pipe(plugins.swig(data))
    .pipe(dest('temp'))
    .pipe(bs.reload({ stream: true }))
}

const image = () => {
  return src('src/assets/images/**', { base: 'src' }).pipe(plugins.imagemin()).pipe(dest('dist'))
}

const font = () => {
  return src('src/assets/fonts/**', { base: 'src' }).pipe(plugins.imagemin()).pipe(dest('src'))
}

const extra = () => {
  return src('public/**', { base: 'public' }).pipe(dest('dist'))
}

const serve = () => {
  watch('src/assets/styles/*.scss', style)
  watch('src/assets/scripts/*.js', script)
  watch('src/*.html', page)
  watch(['src/assets/images/*.scss', 'src/assets/fonts/*.scss', 'public/**'], bs.reload)

  bs.init({
    notify: false,
    port: 1233,
    server: {
      baseDir: ['temp', 'src', 'public'],
      routes: {
        '/node_modules': 'node_modules',
      },
    },
  })
}

const useref = () => {
  return src('temp/*.html', { base: 'temp' })
    .pipe(plugins.useref({ searchPath: ['temp', '.'] }))
    .pipe(plugins.if(/\.js$/, plugins.uglify()))
    .pipe(plugins.if(/\.css$/, plugins.cleanCss()))
    .pipe(plugins.if(/\.html$/, plugins.htmlmin({ collapseWhitespace: true, minifyCSS: true, minifyJS: true })))
    .pipe(dest('dist'))
}

const compile = parallel(style, script, page)

const build = series(clean, parallel(series(compile, useref), image, font, extra))

const dev = series(compile, serve)

module.exports = {
  build,
  dev,
}
